A biologist discovers a new species of organism adapted to living in a deep underground cavern that provides no source of free water. The organism is eyeless and covered by fur, and it has a four chambered heart with a closed circulatory system. What excretory system adaptations to this extreme environment might the biologist expect to find?
A. Nephrons with long loops of Henle
B. Very short malpighian tubules
C. Very long malpighian tubules
D. Nephrons with short loops of Henle
E. Metanephridia with a large number of nephridiopores
Answer: A
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